當(dāng)手機(jī)突然來(lái)電話時(shí),音樂(lè)播放不會(huì)自動(dòng)停止,避免影響接聽(tīng)電話,我們還需要手動(dòng)做中斷處理

最早的打算處理是通過(guò)AVAudioPlayer的AVAudioPlayerDelegate代理方法實(shí)現(xiàn),中斷相關(guān)的代理方法有:

- (void)audioPlayerBeginInterruption:(AVAudioPlayer *)player NS_DEPRECATED_IOS(2_2, 8_0);

- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player withOptions:(NSUInteger)flags NS_DEPRECATED_IOS(6_0, 8_0);

- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player withFlags:(NSUInteger)flags NS_DEPRECATED_IOS(4_0, 6_0);

- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player NS_DEPRECATED_IOS(2_2, 6_0);

目前已經(jīng)過(guò)期,在API中會(huì)提示使用AVAudioSession代替

/* AVAudioPlayer INTERRUPTION NOTIFICATIONS ARE DEPRECATED - Use AVAudioSession instead. */

點(diǎn)進(jìn)AVAudioSession中,翻到最下面的找到AVAudioSessionDelegate代理方法

#pragma mark -- AVAudioSessionDelegate protocol --
/* The AVAudioSessionDelegate protocol is deprecated. Instead you should register for notifications. */
__TVOS_PROHIBITED
@protocol AVAudioSessionDelegate <NSObject>
@optional 

- (void)beginInterruption; /* something has caused your audio session to be interrupted */

/* the interruption is over */
- (void)endInterruptionWithFlags:(NSUInteger)flags NS_AVAILABLE_IOS(4_0); /* Currently the only flag is AVAudioSessionInterruptionFlags_ShouldResume. */
        
- (void)endInterruption; /* endInterruptionWithFlags: will be called instead if implemented. */

/* notification for input become available or unavailable */
- (void)inputIsAvailableChanged:(BOOL)isInputAvailable;

@end

協(xié)議注釋中提到AVAudioSessionDelegate protocol也過(guò)期了,建議我們使用notifications

接下來(lái)就通過(guò)通知的方式,對(duì)音樂(lè)播放器做打斷處理

回到之前封裝的音樂(lè)播放工具類,在init方法中添加監(jiān)聽(tīng)通知

// 監(jiān)聽(tīng)事件中斷通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(audioSessionInterruptionNotification:) name:AVAudioSessionInterruptionNotification object:nil];

在監(jiān)聽(tīng)到中斷事件通知時(shí),通過(guò)通知中的
notification.userInfo[AVAudioSessionInterruptionOptionKey]的Value可以判斷當(dāng)前中斷的開(kāi)始和結(jié)束,Value為NSNumber類型,所以判斷時(shí)需要轉(zhuǎn)為本數(shù)據(jù)類型

當(dāng)中斷開(kāi)始時(shí),停止播放
當(dāng)中斷結(jié)束時(shí),繼續(xù)播放

// 監(jiān)聽(tīng)中斷通知調(diào)用的方法
- (void)audioSessionInterruptionNotification:(NSNotification *)notification{
    
    /*
         監(jiān)聽(tīng)到的中斷事件通知,AVAudioSessionInterruptionOptionKey
     
         typedef NS_ENUM(NSUInteger, AVAudioSessionInterruptionType)
         {
             AVAudioSessionInterruptionTypeBegan = 1, 中斷開(kāi)始
             AVAudioSessionInterruptionTypeEnded = 0,  中斷結(jié)束
         }

     */
    
    int type = [notification.userInfo[AVAudioSessionInterruptionOptionKey] intValue];
    
    switch (type) {
        case AVAudioSessionInterruptionTypeBegan: // 被打斷
            [self.audioPlayer pause]; // 暫停播放
            break;
        case AVAudioSessionInterruptionTypeEnded: // 中斷結(jié)束
            [self.audioPlayer play];  // 繼續(xù)播放
            break;
        default:
            break;
    }
}